In November 2017, IBAC commenced an inquiry into police conduct after receiving new information.

IBAC Commissioner Robert Redlich QC said the public hearings would examine the taking of witness statements by police.

He described the practices as "concerning" and having potential to impact the integrity of criminal investigations and the delivery of justice.

Mr Redlich said the hearings were not a reopening of the investigation into the murders and that IBAC would not review the convictions resulting from that investigation.

He said instead, the hearings would focus on the taking of witness statements, the preparation of the brief of evidence for the trial, whether there was full disclosure of witness statements or other relevant information prior to or during the trial and compliance with obligations to disclose evidence.

Sergeant Silk, 35, and Senior Constable Miller, 34, were shot dead after investigating a series of armed robberies in Melbourne's southeast.